hi, is there any way to adjust the timing on a 1995 Z71 chev pickup?
Mar 6, 2006 at 6:43 PM
1995 GMC C1500 Timing Adjustment
NOS155
- MEMBER
- 16 POSTS
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look on the lable under the hood if you don't have a flat top type dist yes you can set timing .there will be a connector at the back of the firewall which is tan with a black stripe un plug it star the truck i think it sets at 0 but check the sticker for sure loosen the dist adjust timing lock down reckeck if still ok shut off truck reconnect wire and your set . if it has the flat top type dist there are no adjustments it is fixed and controled by the computer hope this helps.(NOS)
Mar 8, 2006 at 3:57 PM
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Suggested Repair
Check the underhood label for the timing spec. If the distributor is not the flat-top type, unplug the tan connector with a black stripe at the back of the firewall, start the engine, loosen the distributor, set timing to the sticker specification, lock it down, recheck, shut off, and reconnect the connector. If it has a flat-top distributor, timing is fixed and computer-controlled with no adjustment.
Conversation Summary
The owner of a 1995 GMC C1500 asked whether ignition timing can be adjusted on the TBI engine. The expert said non-flat-top distributors can be timed by unplugging a tan connector with a black stripe at the firewall, setting timing to the underhood sticker, then reconnecting. Flat-top distributors are fixed and controlled by the computer.